Introduction: Marvels and speculation: the aliens are out there, but are they here? -- The UFO community: experiences, activities, and agendas -- Possible shapes and forms of intelligent extraterrestrial life: well, you look a little peculiar yourself! -- UFO propulsion: are we there yet? -- UFOs and airpower before the age of flying saucers: frogs, wheels within wheels, airships, and comet trouble -- UFOs and World War II: gremlins, balloon bombs, and the world in the balance -- "The world of tomorrow": the future is now-- don't get trampled -- Kennedy Arnold, the eyewitness: he saw what he saw when he saw it -- Always Roswell: not just another day in the desert -- Project Blue Book, or How UFOs took over American culture: government, the military, and the CIA, too -- Close encounters of the unnerving kind: aggressive aliens, seven degrees, and a cop on the front line -- Conspiracies and cover-ups: the government tells lies, Earth is hollow, the Men in Black are who-- and guess who killed Marilyn Monroe? -- Making friends: beautiful, ageless visitors who share the wisdom of the universe -- Abductions: helplessness, pain, and fractured memory -- UFOs, channeling, quasi-religion, and cults: "Salvation will come from the cosmos! I have been chosen, so pledge your lives to me!" -- Hoaxes and other mischief: Martian invasions, shaved monkeys, and more tomfoolery -- Getting to where the UFOs are: grab your UFO spotter's checklist and go -- Afterword: Where do we go from here? Exploration, knowledge, and the future of UFOlogy.